Snow height on sea ice and sea ice drift from autonomous measurements from buoy 2018S76, deployed during AKADEMIK TRYOSHNIKOV cruise TRANSDRIFT XXIV (TICE)

Snow height was measured by the Snow Depth Buoy 2018S76, an autonomous platform, drifting on Arctic sea ice, deployed during AKADEMIK TRYOSHNIKOV cruise TRANSDRIFT XXIV (TICE). The resulting time series describes the evolution of snow depth as a function of place and time between 15 September 2018 and 27 April 2019 in sample intervals of 1 hour. The Snow Depth Buoy consists of four independent sonar measurements representing the area (approx. 10 m**2) around the buoy. The buoy was installed on multi year ice. In addition to snow depth, geographic position (GPS), barometric pressure, air temperature, and an internal ice temperature were measured. Negative values of snow height occur if surface ablation continues into the sea ice. Thus, these measurements describe the position of the sea ice surface relative to the original snow-ice interface. Differences between single sensors indicate small-scale variability of the snow pack around the buoy. The data set has been processed, including the removal of obvious inconsistencies (missing values). Records without any snow depth may still be used for sea ice drift analyses.

本数据集的雪深数据由编号为2018S76的雪深浮标（Snow Depth Buoy）采集，该浮标为自主观测平台，搭载于北极海冰之上随冰漂移，部署于AKADEMIK TRYOSHNIKOV号执行的TRANSDRIFT XXIV（TICE）巡航任务期间。所获取的时间序列记录了2018年9月15日至2019年4月27日期间，雪深随空间位置与时间的演化特征，采样间隔为1小时。该雪深浮标集成了四组独立声呐测量单元，用于采集浮标周边约10平方米区域的观测数据。该浮标部署于多年冰之上。除雪深参数外，该浮标还同步采集了地理定位（GPS）、大气压强、空气温度以及浮标内置冰温等多类观测数据。当海冰表面消融持续深入海冰内部时，雪深观测值会出现负值，此类观测值实际表征的是海冰表面相对于初始雪冰界面的相对位置。各独立传感器间的观测差值可反映浮标周边积雪层的小尺度空间变异性。本数据集已完成预处理流程，涵盖对明显异常记录（含缺失值）的剔除操作。即便未获取有效雪深数据的观测记录，仍可用于海冰漂移相关分析。